A coil of something conductive to produce the electromagnetic field is the bare minimum. Most electromagnets also have a ferrous metal (which is magnetized in turn) core or housing as well.
laminated iron sheets this will prevent eddy currents of electricity however will be superbly magnetic and will containand amplify the electromagnetic field
Copper wire insulated from but wrapped around an Iron core will create an electromagnet if energised with an AC or DC current.
Soft iron is used as the core of an electromagnet. It increases the strength of the magnet.
Iron - use a bunch of iron nails, wrapped many times with insulated copper wire, if making your own electromagnet.
Soft iron core
One of them is how many coils go around the electromagnet. also the amout of current flow< and the type of core material.
Its called an electromagnet
Use: More turns of wire A higher current A larger core area A core material with high permeability (soft iron instead of air for example)
steel is note for an elecromagnet because once it turned magnetic it stays magnetic
Iron - use a bunch of iron nails, wrapped many times with insulated copper wire, if making your own electromagnet.
Soft iron core
An electromagnet requires only two parts, a core of ferro-magnetic material and wires winding around it. The wires magnetize the core when current flows through them, and the core then creates the magnetic field which the electromagnet is intended to produce.
using a stronger ferromagnetic material for the core. :)
Electromagnet is a device consisting of a core of magnetic material such as iron, surrounded by a coil through which an electric current is passed to magnetize the core.
Permeability of the medium, that too, if it is ferro-magnetic material then it gets increased to a larger extent and so the magnetic induction too increases enormously.
One of them is how many coils go around the electromagnet. also the amout of current flow< and the type of core material.
I cannot remember for sure, but in an electromagnet, an aluminum core would not have any permeability to add to the electromagnet's strength. An electromagnet is more efficient when a thicker core is used; it generates more power. The material you use should be prone to magnetism, as in attracted by permanent magnetic apparatuses or the such. So, an aluminum bar/core (cannot be magnetized), like you stated, wouldn't be the best choice for your magnet's core.
Its called an electromagnet
If the electromagnet has a core, which has become magnetized, then the core will have a residual magnetic field when the power is removed.
A ferrous core.